AP Psychology Unit 4 Vision

The amplitude of electromagnetic waves determines the ________ of light.

• absolute threshold
• hue
• difference threshold
• brightness

The amount of light entering the eye is regulated by the

• iris
• optic nerve
• retina
• lens

Accommodation refers to the

• quivering eye movements that enable the retina to detect continuous stimulation.
• process by which the lens changes shape to focus images on the retina.
• diminishing sensitivity to an unchanging stimulus.
• process by which stimulus energies are changed into neural messages.

Which cells for visual processing are located closest to the back of the retina?

• bipolar cells
• ganglion cells
• rods and cones
• feature detectors

Feature detectors

• combine to form the optic nerve, which sends visual information to the brain.
• are retinal cells that allow you to see in dim light and are located in the periphery of the eye.
• are nerve cells in the brain's visual cortex that fire in response to specific edges, lines, and angles.
• cause the lens to change its curvature in response to incoming light waves.

Experiencing a green afterimage of a red object is most easily explained by

• the Young-Helmholtz theory.
• the opponent-process theory.
• frequency theory.
• the gate-control theory.

Wavelength is to ___________ as ___________ is to brightness.

• Hue; intensity
• Intensity; hue
• Frequency; amplitude
• Brightness; hue

Nearsightedness is a condition in which the:

• Lens has become inflexible
• Lens is too thin
• Eyeball is longer than normal
• Eyeball is shorter than normal

The size of the pupil is controlled by the:

• Lens
• Retina
• Cornea
• Iris

Which of the following is the correct order of the structures through which light passes after entering the eye?

• Lens, pupil, cornea, retina
• Pupil, cornea, lens, retina
• Cornea, retina, pupil, lens
• Cornea, pupil, lens, retina